Last name Vassilios (Vassilios 
, Βασίλειος , Василиос 
) , all around the world, is a very rare family name. The last name Vassilios is habitual in Greece, where it is a rare surname, Bulgaria, and Australia, where it is a very rare surname. Measured by absolute frequency, it is commonest in Greece, Germany, and Bulgaria. Much more prevalently, Vassilios is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vassilios | Germany, Canada, United States, Greece, Brazil |
| Βασίλειος | Greece |
| Василиос | Russia, Bulgaria |
| Vassillios | Greece, United States |
Basil, Basile, Basileios, Basili, Basilide, Basilio, Basilius, Basos, Basílio, Bazil, Bazilij, Bazilo, Bazyli, Lakis, Pasi, Vasil, Vasil', Vasile, Vasileios, Vasili, Vasilii, Vasilij, Vasilije, Vasilios, Vasilis, Vasiliy, Vasily, Vasos, Vassil, Vassileios, Vassili, Vassilis, Vassyl, Vasyl, Vaszil, Vaszilij, Vazul, Wasil, Wasilij, Wasos, Wassil, Wassili, Wassily, Wassyl, Wasyl, Βάσος, Βασίλης, Λάκης, Базил, Базиле, Базили, Базилий, Базилио, Базило, Базилій, Басиль, Безіл, Бэзил, Вазул, Васил, Василе, Василевс, Василие, Василий, Василис, Василије, Василь, Василій, Вассил, Вассили, Вассілі, Васыль, Васька, Вася, Васіль, Васілій, Паси, Վասիլի, וסילי, باسيل, فاسيل, فاسيلي, واصل, ვასილ, ვასილი, バジル, and 瓦西里
Mewes, Danginis, Georgiou, Alexiadis, Papadakis, Droggitis, Lazaridis, Vassiliou, Ioannidis, Karakostas, Parashidis, Parlavantzas, Dimopoulos, Georgiadis, Dimitriadis, Theodorakos, Vassiliadis, Angelopoulos, Papadopoulos, Papageorgiou, Papachristou, Dimitropoulos, Petridis, Kyriazis, Kamouzis, Canellos, Lagos, Outos, Zikos, Kalfas, Kontos, Pappas, Raptis, Trikos, Foukas, Zachos, Christodoulatos, Ziogas, Bletsos, Katakis, Lazarou, Levakis, Livanos, Tzoumas, Halkias, Zamanis, Maniotis, Aidiniou, Agrevis, and Konstantinidis